Concrete compacting device



Aug. 29, 1950 P. F. coNNoLLY ETAL CONCRETE coMPAcTING DEVICE 4Sheets-Sheet 1 Filed March 8, 1946 Aug 29, 1950 P. F. coNNoLLY ETALCONCRETE coMPAcTING DEVICE 4 Sheets-Sheet 2 Filed March 8, 1946 A118 29,1950 P. F. CONNOLLY ETAL 2,520,833

CONCRETE COMPACTING DEVICE Filed March 8,A 1946 4 Sheets-Sheet 5 P. F.CONNOLLY ETAL 2,520,833

CONCRETE CCMPACTINC DEVICE Aug. 29, 1950 Filed March 8, 1946 4Sheets-Sheet 4 l j E@ Patented Aug. 29, 1950 UNITED STATES PATENT oFFlcECONCRETE COMPACTING DEVICE Peter F. Connolly, Chicago, Ill., and CharlesH. Holmstrom, San Diego, Calif.

Application March 8, 1946, Serial No. 652,866 Y 3 Claims.

The present invention relates to concrete compactors and moreparticularly to a device for compacting a cement wall.

When cement is poured, it must be carefully and thoroughly compacted orair holes or pockets will form in it around the larger stones and aroundthe structural metal members or reinforcing bars customarily used insuch constructions. When the concrete is laid on a flat surface, as inconstructing a iloor, it is a relatively easy matter to compact theconcrete by tamping it after it has been poured. Where the structure isvertical, as in a wall, however, such tamping is not as convenient oreffective because the concrete is poured in forms and all tamping mustbe from above. Preferably the concrete must be tamped after every footor so has been poured. This results not only in delay but because of thelarger amount of structural support members necessary in. a wall is nottoo effective and holes or pockets result. Furthermore, tamping alwaysresults in uneven compacting as the side or surface that is tamped iswell compacted, but the parts spaced from this side or surface do notget the full force of the tamping action and usually retain some of theairl holes or pockets initially formed therein.

An object of the present invention is to compact concrete internally bythe insertion of an agitating or vibrating device Which will compact theconcrete thoroughly and remove all air holes or pockets and which willact quickly so that it may be gradually raised as fast as the concreteis poured, thus eliminating the delays previously encountered.

Another object is to provide a compacting device that is electricallydriven so that many compactors may be operated by one person.

Still another object is to provide a compactor that vibrates or agitatessideways from the center of the layer of concrete and hence compacts theconcrete uniformly. Y

Still another object is to provide a compactor that is very long andthin so that it may be inserted and withdrawn between the metalstructural members or reinforcing bars.V Another object is to provide adevice adapted to compact concrete and thin semi-Huid masses which arepoured into forms in planes other than horizontal.

" Further objects and advantages will become readily apparent from thefollowing detailed description taken in connectionI with theaccompanying drawings illustrating preferred forms of the inventionwherein:

Fig. 1 is a perspective view of a concrete wall under constructionl andbeing compacted in accordance with the present invention, but with partsbroken away for the purpose of clarity.

Fig. 2 is a vertical sectional view of a compactor embodying theinvention. l

Fig. 2A is a diagrammatic showing of a switch suitable for use in thecompactor.

Fig. 3 is an enlarged fragmentary sectional view of the device shown inFig. 2 and in a plane at right angles to the plane of Fig. 2.

Fig. 4 is a view similar to Fig. 3 but in the same plane as Fig. 2.

Fig. 5 is a sectional view taken on the line 5 5 of Fig. 4. p

Fig. 6 is a sectional view taken` on the line 6--6 of Fig. 4.

Fig. 7 is a sectional view taken on the line 1-1 of Fig. 4.

Fig. 8 is a vertical sectional view of an alternate form of thecompacting device.

Fig. 9 is a sectional View of the device shown in Fig. 8, but in a planeat right angles to the plane. of Fig. 8.

Fig. 10 is a sectional view taken on the line |0-'-|0 of Fig. 9.

Fig. 11 is a sectional view taken on the line Il-Il of Fig. 9.A

Fig. 12 is a sectional view taken on the line I2-l2 of Fig. 9.

Fig. 13 is a'vertical sectional view of another alternate construction.

Fig. 14 is -a sectional view taken on the line |4-l4 of Fig. 13.

Fig. 15 is a sectional view taken on the line l5-l5 of Fig. 13.

While we have shownand described certain embodiments of our invention itis to be understood that it is capable of many modifications. Changes,therefore, in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claims.

In Fig. 1 of the drawings, there is shown a concrete wall showngenerally at 2D being constructed in a form comprising a front wall 2|made of a single layer of boards and a similar back wall 22 on which isprovided a platform 23 for the workmen. A suitable power line (notshown) supplies electric current to a plurality of leads in cables 24each of which is connected to a compactor 25. These Compactors aresuspended by the cables between the Walls of the form and as wetconcrete 2.6 is poured into the form are energized to vibrate the wetconcrete around them, and thereby compact the concrete by eliminatingall air spaces or pockets formed therein around larger stones in theconcrete and around or adjacent the customary structural metal members(not shown) embedded in the concrete. As illustrated, the Compactors areembedded in the concrete every few feet and, as the concrete rises ormounts in the forms, are adapted to be gradually raised by the workmanto compagct higher parts of the wall. pactorsv being .relatively smallin fdiameter, v*the concrete will ow into and fill the space formerlyoccupied by them as they are gradually raised; and they may be readilyWorked up through .any reinforcing rods or the like in the concrete.

Figs. 2-7 of the drawings disclose ya :preferred form of compacter inwhich the compactor comprises a long, thin cylindrical ,casing 210imetal, plastic, rubber or other suitable materialv Which will not beaffected or damaged by the wet concrete. The upper end of the casing ispromised-.with .alcol-lar 2.3 adanted to receive-the end ofaca'nle .24.zllheother .end ofthe casing `is n-lied by n nlug 219 suitably securedthereto and having a central y.tl-1readed opening drilled therein to re`ceive a threaded nut 3B extending from a. .disk flzforming the `holttomel an inner cylindricalcasn ing s2. The disk 3j is threaded into .theraising 3.2 as shown #and a lock washer holds the disk .3.4 inni-ace. v

Secured abovethe disk .32 is a solenoid 34 hay .a .square .central .bere.into which extends whe lower square end 35a of a shaft 3 5, The upperend ofthe .inner casing is also .threaded internally to receive a disk36 under which is secu-red a solenoid El, a .loch washer .3.8 holdingthe. disk 3B in place. The solenoid 31 also has a central cullare .boreinto which the other end 35e of th shaft 35 extends. L

The Ycentral portion ci the shaft 3.5 isenlaireed, and hollowed out to.term an openingzf.. Be-

tween the central section and the square endsY sand .35o .ari-:sections35e and 55dcf circular cross section, but of smaller diameter than theY.en-trai section. Around these sections 35e and 35d are ball bearings 39in raceways 4i! .secure to inner easing member ..32 by means ofvthreaded bolts 4i. A pair of bracketsLl?u are sen cured to `the innerwall of the casing 32 are provided with aligned openings in which ismmm-ted a stub shaft 43. A walking beam A4. is pivotally mounted on this`shaft .and .as shownin Fig. l .extends through the opening 35j intheshaft 35. i

bolt lHalso extends through the center ofthe shaft '35 and through theWalking 'beam44 andis held. in place hy a nut d, the bolt .de being ofless diameter than the openings in the shaft 35 and wailnng beam 44through which Vthe boltv (not shown) Yleads .from these-solenoids to areturn in, the cable 24. .In operation the solenoids 34 and 31 arealternately energized by the switch 48 and hence raise- `and lower theshaft 35 causing the heavy walking bea-m 44.130 oscillate back and forthon the The comv In 'the alternate constructionashown inrlligs.

8-l2, the compactor device 425 comprises an ou'ter casing 21 suspendedfromV a cable 24 as in the previous figures and an inner cylindricalcasing 32 which is provided with a pair of internal flanges H33.Solenoids 34 and 31 are -mounted `in eachpend of theV casing as in theprevious figures and extending into the bores thereof are the squareends l35a and 1351) of a'shaft I 35. As shown, this shaft |35 has acircular central section :i350 connecting the two end sections.Surrounding the shaftsection lc is a sleeve .member -l 4having a heavyextensionorproiection ideeen .one side thereof, .cut-out portions i365on its opposite side and aslot .lcinits centr-al portion. .Inthe sloti350 and .rotatably in. vuitedfon 1a :bolt .L31 threadedinto thevsliiaft section iddo Vis .a rol-ler i3d. .The sleeve-35 secured inposition-in the casing ld2 by V.means of ball bearing assemblies it@bolted to .a reduced end of the sleeve .and with their outer racemembers pressed-into thev casing i 312 andagainst .the tia-egcs -I 3d.r.Phe electrical-connection the saineas that 'of 2 7 inclusive.

weight of the sleeve., by reason of the profjection Lfa and .cutseutportion 4.3819 :is very much ofi-center As the shaft i315 is yrapidlyreciprecated :up and downby the .solenoids 34 and .Si it `Forces the.sleeve to oscillate, .andthe of `:dieven-lent thereof results in ratherviolent fibra-tion of lthe entire device `in -a sidewise action becausefof the sleeves oi-center weight. Coinpactin-g of the wet concrete asexplain-ed above results; Y

.In Figs. 13.110 1,5, still another compacter de vice construction 225is disclosed comprising an outer casi-ng 221 in the upper part-of vwinchis mounted -a small electric motoring, the shaft 2M of which is`enlarged at 2Mow-here itis journaled in ball bearings 2st mounted in .asleeve 1284 threaded to the .lower vend o the casing of the motor andAspaced .therefrom .by a washer 235'. A sleeve Aimpressed in the upperend .of the .housing 2.1 .is threadedly secured to the upper end of the.motor which is also held in place by washer 231 and a nut 298 likewisethreaded. into the sleeve .2.65. A lead .25a from a cable 2s isconnested tothe motor. Y

Below theenlarged section 2Mo the shaft 21H is hanged at .2mb which alsoprovides amounting tor the .movable part .of the bearing assembly 263,Below the .flange .2Mb the shaft-section 2te is reduced in size and isAprotided on one side with a heavy bladeZDSfto provide an -oicenterweight. The lower end of the shaft extends ifntoa central opening 2 lllin thebase '2l-l of the casing i221y where itis journaled in a ballbearing 212 in a groove at the top of the vopening 210 and is heldin'place by a flange 'llldv on the shaft. f

As the shaft 2m is rotated by the motor, .it

vibrates sidewise due to the offucenter weight of' the blade .2&9 andari action similar to tl-iat .of the precedingiigures results.

Weclaim: l. 1. A concrete compacting device, comprising: a. casingadapted to vbe inserted intovwetconcrete; solenoids in each end of saidcasing; a member adapted to be reciprocated by said solenoids; and aneccentric driven by said member to vibrate the casing.

2. A concrete compacting device, comprising: a. casing adapted to beinserted intoy wet concrete; solenoids in each end of said casing; meansfor alternately energizing said solenoids; a member extending into andreciprocated by said solenoids; and an eccentric oscillatably driven bysaid member to vibrate the casing.

3. An agitator comprising: a generally cylindrical casing having alength at least several times its diameter and adapted to be suspendedin the material to be agitated; a pair of soienoids in said casing;means for alternately energizing said solenoids; a member adapted to beoscillated by said soleno-ds to vibrate said casing in a substantiallyhorizontal direction; and means connecting said member to both of saidsolenoids.

PETER F. CONNOLLY. CHARLES H. HOLMSTROM.

6 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

